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authorGao Feng <fgao@ikuai8.com>2017-04-04 21:09:48 +0800
committerDavid S. Miller <davem@davemloft.net>2017-04-05 07:50:32 -0700
commit589c49cbf9674808fd4ac9b7c17155abc0686f86 (patch)
tree7065ecc4a28f72a6fd73570a0b793d92fee62e88 /net/ipv4/tcp.c
parent5e351410667ab0bf0dd1845730cba8b2211781e7 (diff)
net: tcp: Define the TCP_MAX_WSCALE instead of literal number 14
Define one new macro TCP_MAX_WSCALE instead of literal number '14', and use U16_MAX instead of 65535 as the max value of TCP window. There is another minor change, use rounddown(space, mss) instead of (space / mss) * mss; Signed-off-by: Gao Feng <fgao@ikuai8.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 1665948dff8c..94f0b5b50e0d 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2393,7 +2393,7 @@ static int tcp_repair_options_est(struct tcp_sock *tp,
u16 snd_wscale = opt.opt_val & 0xFFFF;
u16 rcv_wscale = opt.opt_val >> 16;
- if (snd_wscale > 14 || rcv_wscale > 14)
+ if (snd_wscale > TCP_MAX_WSCALE || rcv_wscale > TCP_MAX_WSCALE)
return -EFBIG;
tp->rx_opt.snd_wscale = snd_wscale;